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7 Comments

  1. 1

    Eric Robert

    If they do gutters and downspouts will they do something to manage the runoff? The 4 downspouts will concentrate the runoff vs. having the water come off the entire lengths of the roof and hitting the cement below in a more dispersed pattern.

    I imagine it won’t be difficult to devise something, but hopefully they’ve thought of that. And it shouldn’t be channeling the water to a sewer since that is not a good solution for water quality.

    Dealing with the 4 downspouts/storm water should be done in a manner that allows the water to percolate into the ground, this is best done with shallow depressions that are landscaped. These depressions temporarily store the water for lets say no more than 24 hours allowing the water to work its way into the ground, or overflowing on the rare high volume rain event.

    Piping storm water to the sewer or street just dumps it into the Nancy Creek and contributes to downstream flooding and does not help improve the water quality.

  2. 2

    Saul

    Eric, how amazing you consider this specific issue worthy of discussion. This pavilion sits in a large open area that gently slopes towards two directions with plenty of area for absorption of a light to moderate rain runoff. This site is on a cut of what is basically red clay with little chance for fast percolation of accumulated or trapped runoff created by a gully washer. Maybe we should blame DeKalb for removing the existing forest and top soil for this pavilion and demand that they provide the necessary drainage system to handle the resulting water runoff from their poor park planning. Accepting grassing as an alternative method of water dispersion is not an acceptable alternative in Brookhaven.

    Next thing you know you will be complaining about the water from a rain that God created flowing down Ashford Dunwoody and eventually making its way into Nancy Creek. You think we should just do away with Ashford Dunwoody Road to eliminate this problem?

  3. 3

    Eric Robert

    No Saul I don’t think we should tear up Ashford Dunwoody road. Though there are several ways we could improve storm water management but rethinking how we deal with water runoff from streets and parking lots. Parking lots especially. Marist implemented some of these better practices in that lot they built next to the YMCA/Concorde Soccer fields.

    Things like pervious surfaces and not using curbs but instead landscaped areas and swales

    http://www.epa.gov/greeningepa/stormwater/best_practices.htm
    Curbs and gutters transport flow as quickly as possible to a stormwater drain without allowing for infiltration or pollutant removal. Eliminating curbs and gutters can increase sheet flow and reduce runoff volumes. Sheet flow, the form runoff takes when it is uniformly dispersed across a surface, can be established and maintained in an area that does not naturally concentrate flow, such as parking lots. Maintaining sheet flow by eliminating curbs and gutters and directing runoff into vegetated swales or bioretention basins helps to prevent erosion and more closely replicate predevelopment hydraulic conditions. A level spreader, which is an outlet designed to convert concentrated runoff to sheet flow and disperse it uniformly across a slope, may also be incorporated to prevent erosion.

    Infiltration trenches
    Infiltration trenches are rock-filled ditches with no outlets. These trenches collect runoff during a storm event and release it into the soil by infiltration (the process through which stormwater runoff penetrates into soil from the ground surface). Infiltration trenches may be used in conjunction with another stormwater management device, such as a grassed swale, to provide both water quality control and peak flow attenuation. Runoff that contains high levels of sediments or hydrocarbons (for example, oil and grease) that may clog the trench are often pretreated with other techniques such as water quality inlets (series of chambers that promote sedimentation of coarse materials and separation of free oil from storm water), inlet protection devices, grassed swales, and vegetated filter strips.

    https://www.portlandoregon.gov/bes/article/78489

    Runoff from more than four acres of impervious parking lot surface now receives pollution
    filtration.
    • Over the course of a typical year, the stormwater facilities remove almost 3,900,000 gallons of
    runoff from the storm sewer system.
    http://www.coastal.ca.gov/nps/lid-factsheet.pdf

  4. 4

    Saul

    Eric, all sound ways of dealing with water runoff. Do you really see Brookhaven implementing these water management practices? I don’t and your suggestions, taken to the extreme, are progress killers. Personally, I like more forested areas and less hard surfaces to deal with, just eliminating progress altogether.

    Many people forget that 100 years ago rivers like the Chattahoochee or creeks like Peachtree and Nancy had tremendous flooding issues during rainy seasons. Back then, there were no hard surfaces to blame. It was nature being nature. Conservation is a good thing, but let’s not get too crazy with our zeal to save the earth.

  5. 5

    Carrie

    Happy thanksgiving y’all!

  6. 6

    Eddie E

    Wow, next you will be suggesting people live/build only on areas above the flood plain with adequate vegetative buffers to protect the stream!

  7. 7

    Tom Reilly

    The National Wildlife Federation has just embarked on a tree bank program where selected native trees can be shipped to areas where they can be planted to address all these issues. Minimum order of one hundred trees, NO MAXIMUM ORDER, and even the shipping is free!! You can contact http://www.nwf.org for more information. Brairwood Park’s Chad Bowles has already placed an order!!–Tom Reilly, National Wildlife Federation, [770]457-4070. marei@mindspring.com.

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